# coding=utf-8
# Copyright 2024 The Google Research Authors.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#     http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
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# pylint: skip-file
from fpylll import IntegerMatrix, LLL
import numpy as np


def lll_reduce(M, delta):
  return integer_matrix_to_numpy(LLL.reduction(M, delta=delta))


def integer_matrix_to_numpy(M):
  m, n = M.nrows, M.ncols
  D = np.zeros((m, n), dtype=int)
  M.to_matrix(D)
  return D
